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Detection of Homologue and Isomer Vapors through Dynamic Reflection Spectra of Hollow Mesoporous Silica Sphere Photonic Crystals
Author(s) -
Xiong Chengjia,
Pan Mengyao,
Wang Lebin,
Geng Hongbin,
Zhao Jiupeng,
Li Yao
Publication year - 2018
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201801451
Subject(s) - reflection (computer programming) , refractive index , mesoporous silica , diffusion , spectral line , photonic crystal , materials science , mesoporous material , photonics , analytical chemistry (journal) , optoelectronics , optics , chemistry , organic chemistry , computer science , physics , catalysis , thermodynamics , astronomy , programming language
Vapors of homologues and isomers with very similar refractive indices can be easily distinguished by using dynamic reflection spectra (DRS) of hollow mesoporous silica sphere (HMSS) photonic crystals (PCs). Different diffusion behaviors render the HMSS PCs with a distinct response to different chemicals vapors, leading to diversity in the evolution of the reflection spectra and their DRS patterns. Therefore, by studying the geometric characteristics and color changes of color‐filled contour maps, as well as the reflection peak shift speeds at different stages, even isomers such as n ‐butanol and iso ‐butanol, with a refractive index difference of only 0.001, can be recognized. The reflection peak shift speed depends on both the refractive index and the diffusion speed of chemicals. The proposed strategy provides a convenient, accurate, and low‐cost method to detect vapors of homologues and isomers.